Choral Singing Textbook

Are you looking for a classroom textbook for learning to read music and to acquire basic skills for singing in choir? This book is an introduction to sight singing and best practices for beginning choral singers. It helps singers to learn to read round notes in choral scores while practicing good tone and beautiful vowels. This text uses round notes based on absolute letter names (ABCDEFG). No solfege is printed in the text, but a teacher familiar with reading round notes in solfege can easily implement this. I have found this text effective for teaching Grade 7-8 students.